WIKA GLS-1000 Mode D'emploi page 12

5. Commissioning, operation
5.2 Mounting
Observe the torque values of threads specified in pipefitting work.
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In the selection of the mounting material (sealings and nuts), take the
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EN
process conditions into account. The suitability of the sealing must
be specified with regard to the medium and its vapours. In addition,
ensure it has corresponding corrosion resistance.
Before installation, ensure that the mounting hole and the fixing
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device for the float switch in the vessel are correct in size and
dimension.
Mount the float switch pressure-tight via the mounting thread .
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The guide tube  should not be inclined more than a maximum of
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30° to the vertical.
If the geometry of the float does not fit through the process
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connection, the float must be removed before mounting.
- For this, before removal, mark the position of the float stops  with
a waterproof pen.
- Mark the mounting position of the floats (e.g. "Up").
- After the float switch has been mounted, re-attach the float within
the inside of the tank (pay
attention to the mounting
position!).
- Float stops  must then be
re-attached at the marked
points.
The number of floats and also
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the position of the float stops are
dependent upon the dimension
and the number of switch points.
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WIKA operating instructions model GLS-1000
≤ 30°